I am getting a PS4 but can somebody explain why are the KIngdomHearts series so popular/good/awesome? Were the previous two so good or what? And I'm not even saying it's bad or anything just asking for an opinion...

I actually haven't played the second one, but the first one was great. Imagine all the badassery of a fighting game (like final fantasy) but with disney characters as well. The map and background designs are really well done. And the story line is actually pretty good.